clinometer
noun/klaɪˈnɒmɪtə(r)/, /klɪˈnɒmɪtə(r)/
/klaɪˈnɑːmɪtər/, /klɪˈnɑːmɪtər/
(specialist)- an instrument used for measuring the angle of a slopeWord Originearly 19th cent.: from Greek klinein ‘to slope’ + -meter (see meter).
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clinometer